Wet grinder.



PATENTED JUNE 28,1904` J. J. RBXROTH. WET GRINDBR.

APPLIQATION FILED APB.. 16. 1902.

N0 MODEL.

i UNITED STATES Patented J' une 28, 1901.1;a

JOHN J. vREXEOTH, OE OHIOAGO,V ILLINOIS.

WET GRINDER.

SPECIFICATION forming part of Letters Patent No. 763,635, dated June 28, 1904.

` Application led April 16, 1902.

To (1J/Z whom, t may concern.-

Be it known that I, JOHN J. REXRO'IH, a citizen of the United States, residing at Chicago, in the county7 of Cook and State of Illinois,

'have invented a certain. new and useful Improvement in Wet Grinders, of which the following is a speciiication. Y

. In the use of grinders, particularly those for grinding, finishing, or sharpening tools, instruments, or other devices, it is a necessity in order to obtain the best results and to prevent drawing the temper or softening, impairping, or changing the nature of the metal or material of which the tool, instrument, or device is formed that the wheel or stone have applied to its acting or abrasive face water or other liquid which will keep the face wet or in a condition toprevent the generated heat from the grinding injuriously affecting the metal or material operated upon. It is also desirable when the wheel or stone-is not in use that as under these circumstances it'will become soft in spots "and its cohesiveness and firmness will bedestroyed, producing with the lcontinued use of the wheel or stone depressions, humps, and irregularities, making the acting or abrasive face uneven and impairing the efficiency of the wheel or stonefor use.

The objectsof this invention are to construct a wet grinder the applying of the water or `raising Wheel driven from the grinding wheel or stone; to cause the grinding wheel or stone to operate the water or liquid applying wheel by running in direct contact with said wheel;

i ceptacle or tank.

Serial No. 106,075. (No model.)

to enable the grinding wheel or stone to selfwet its'acting or abrasive face as it revolves and at the same time have the wheel or stone clear of the water or liquid when at rest or not in use; to employawetting-wheel running in the water or liquid for transferring the water or liquid to the acting or abrasive face of the grinder wheel or stone as the grinder wheelor stone is turned or revolved and have the wetting-wheel non-acting when the grinder wheel or stone is at rest or out of use; to locate the grinder wheel or stone and the wetting-wheel in coacting relation with each other in a receptacle or trough containing water or liquid for the grinder wheel or stone to be clear of the water or liquid under normal conditions with the grinder out of use or at rest; to improve the mounting of the grinder wheel Vor stone on its shaft or arbor; to give the wetting-wheel a pressure support or hang by which it will be held against the grinderwheel vor stone; to furnish a spring support or hang for the wetting-wheel operative to hold the periphery of said wheel against the periphery `of the grinder wheel or stone, and to simplify `and improve the construction and operation of the grinder as a whole.

The-invention consists in the features of constructions and combinations of parts hereinafter described and claimed.

In the drawings, Figure l is a top or plan view, Fig. 2 a longitudinal sectional elevation; and Fig..3 a cross-sectional elevation, with the mounting for the grinder wheel or stone and the grinder wheel or stone in section.

The receptacle or tank A, containing the water orother liquid for wetting the grinder wheel or stone, may be made of metal or other suitable material and of the proper dimension to furnish. a chamber for the water or liquid and for containing the wetting-wheel, located in juxtarelation toV and in contact with the grinder wheel or stone mounted on the re- The receptacle or tank shown is of a rectangular or square formation, having a bottom and side and end walls. The grinder wheel or stone is journaled on `the side walls in the construction shown, and,

as shown, the receptacle or tank has a high portion a and a low portion a', and the end walls correspond to the heights'at the respective ends of the receptacle or tank.

The grinder wheel or stone B may be an emery or other wheel or stone adapted for the use intended, and its dimensions, as to diameter and thickness can be such as is necessary for the work to be performed. This grinder wheel or stone is mounted on ashaft or arbor C and is fixedly attached to the shaft or arbor by a sleeve or thimble 6, made of a piece of tubing or other material and having at each end a screw-thread. A nut c screw-threads onto one end of the sleeve or thimble, and' this nut and the sleeve or thimble are locked to the shaft or arbor by'a cross-pin b' passing through the nut, the sleeve or thimble, and the shaft or arbor. A nut c' screw-threads onto the other end of the sleeve or thimble and is free to be entered thereon and to be withdrawn therefrom. The nut c is entered onto its end of the sleeve or thimble, and the nut and the sleeve or thimble are firmly secured to the shaft or arbor C by driving the pin b( through a hole therefor in the nut, the sleeve or thimble, and the shaft or arbor. The grinder wheel or stone is entered onto the body of the sleeve or thimble for its side face to abut against the nut c, and the nut c is then screwed onto its end of the sleeve or thimble and against the side face of the stonev or wheel, clamping the wheel or stone between the nuts and holding it firmly on the sleeve or thimble. The shaft or arbor C is supported in suitable journal boxesv or bearings D. Each journal box or bearing, as shown, is in two halves or sections,one half or section d formed with or attached to the side wall of.

the receptacle, and the other half or section CZ attached to the half or section d by bolts Z2 or otherwise. Each journal box or bearing extends inwardly from the side Wall, as shown, giving the shaft or arbor a long support on each side of the grinder wheel or stone. The shaft at one end is to be provided with a pulley or gearing or a crank, by which it can be revolved.

A wetting-wheel E, made of any suitable material, is located within the receptacle or tank A and is arranged to bear against or contact the under traveling su rface of the grinder wheel or stone in the arrangement shown. This wetting-wheel E has its under surface running in the water or liquid contained in the receptacle or tank, which water or liquid only lills the receptacle or tank tothe height of the lower section or division a thereof. The grinder wheel or stone is mounted so as to have its lower face clear of the water or liquid and out of direct contact therewith, and the wetting of the acting or abrasive face of grinder wheel or stone is by the water or liquid transferred thereto from the peripheral face of the wetting-wheel. The contact of the wetting-wheel with the grinder-Wheel should be, preferably, at one side of avertical 4line passing through the center of the shaft or arbor, so as to leave a clearance-space on the bottom for the grinder wheel or stone to drain off when at rest or not in use, keeping the faceof grinder wheel or stone in a dry condition when not used.

The wetting-wheel is carried by a shaft or arbor c, mounted in the side arms or bars f of a pillar-post or support F in the construction shown, and the pillar-post or support F is attached'to the end of a lifter, which, as shown, is a spring G in the form of a iiat plate; but some other form of spring may be used. The spring G is attached at its xed end, as shown, to a lug or bracket g, formed with or attached to the end wall of the receptacle or tank. rlhe spring Cr exerts an upward force or pressure sufficient to hold' the wetting-wheel with its periphery running against or in Contact with the acting or abrasive face of thegrinder wheel or stone, and the degree of upward force or pressure of the spring should be such as to hold the Wettingwheel lightly in contact with the grinder wheel or stone and not interfere to any great extent with the running of the grinder wheel or stone. The arrangement of the spring could "be varied, and other pressing or lifting means, such as a weight,` could be used in place of the spring-to hold the wetting-wheel against the grinder wheel or stone, and to maintain the contact as the grinder wheel or stone wears away the wetting-wheel can be raised or adjusted otherwise to compensate for wear. f

A pan H is attached to the lower section or portion a of the receptacle or tank to catch the water orliquid thrown ofi1 from the grinder wheel or stone in use and return the same to the interior of vthe receptacle or tank, and a guard -plate for the grinder Wheel or stone may be used,\vhich guard-plate is not shown, but can be of any suitable and well-known form of construction extending up from the pan, and,'as shown, the sides of the pan have a curved inner face 71. for back-owing the water or liquid onto the bottom of the pan. A guard .I is attached to the high part a of the receptacle or tank and partly incloses the periphery and sides of grinder Wheel or stone, as usual in Wet or other grinders, to return the water or liquid thrown olf by the wheel or stone on that side back onto the tank. The shaft or arbor C is to be driven by its pulley and belt or gearing or crank-handle in any usual and well-known manner from any suitable source of power. l

The operation will be well understood from the foregoing description, but, briey, is as follows: The starting of the grinder wheel or stone for use causes the revolution thereof to rotate the wetting-wheel, which wheel runs in IOO IIO

IZO

thefwater or liquid and picks up and transfers the water or liquid to the grinder wheel or stone,wetting its acting face. The wetting operation continues as long as the grinder wheel or stone revolves, assuring a constant' and continuous supplying of water or liquid to the grinder wheel or stone when in use, and the wetting will not cease as long as there is water or liquid in the receptacle or tank in which the wetting-wheel can run, nor So long as the grinder wheel or stone revolves. The stoppage of the grinder wheel or stone at once causes the wetting-wheel to cease its rotation, and with the cessation of the rotation of the wetting-wheel the water or liquid will not be applied to the face of the grinder wheel or stone, and with the stoppage oi' the grinder wheel or stone the face thereof will drain off and become dry. The grinder wheel or stone when at rest is out of direct contact with the water or liquid in the receptacle or tank and is not subject to the deteriorating elects of wet on its acting face, and such face is not liable to become soft in spots, but the Wheel or stone retains its cohesiveness and original qualities, and its acting face remains true and effective.

It will thus be seen that the grinding wheel or stone is in a wet condition when in use and becomes dry when out of use, that the wetting operation is performed automatically with the revolving of vthe grinder wheel or stone, that the application of the water or liquid ceases with they stoppage of the grinder wheel or stone, that the grinder wheel or stone when at rest is out of direct contact of the water or liquid in the receptacle or tank, that the grinder wheel or stone is free to drain itself and become dry when not in use, that the life of the grinder stone or wheel is increased, and that the ill effects from dry grinding are avoided, as with water or liquid in the receptacle or tank it is impossible to operate the grinderwheel without wetting its acting face.

While the invention has been describedwith more or less minuteness of detail as to the construction oi' the parts, it is not to be understood that it is the intention thereby to limit the invention thereto any more than is pointed out in the claims, as it is contemplated to make all proper changes in form, construction, and arrangement, the omission of the elements, and the substitution of equivalents as circumstances may suggest or necessity render expedient for the operation oi' the grinder.

What I regard as new, and desire to secure by Letters Patent, is-

l. In a wet grinder, the combination of a receptacle or tank having a lower section for containing water or liquid, a revoluble grinder wheel or stone mounted on the receptacle or tank, and a rotatable wetting-wheel yieldably supported and located within the lower section of the receptacle or tank in juxtarelation to and in continuous contact with the grinder wheel or stone and operative when the periphery of the grinder wheel or stone is revolving for wetting the grinder wheel or stone, substantially as described.

2. In awet grinder, the combination of a receptacle or tank having its lower section for containing water or liquid, arevoluble grinder wheel or stone mounted on the lower section of the receptacle or tank, a rotatable wettingwheel located within the receptacle or tank in juxtarelation to and in continuous contact with the grinder wheel or stone, anda support fixed at one end and carrying the wetting-wheel at its free end, for the wetting-wheel to be operative when the grinder wheel or stone is revolving and non-operative when the grinder wheel or stone is at rest, substantially as described.

3. In a Wet grinder, the combination oi'a receptacle ha ving a lower section Jfor containing water or liquid, a revoluble grinder wheel or stone mounted on the receptacle or tank, a rotatable wetting-wheel within the lower section of the receptacle or tank located'in juxtarelation to and in continuous contact with the grinder wheel or stone, a pillar-block or support for the wetting-wheel, and a spring tixedly attached at one end and carrying the pillar-block or support of the wetting-wheel at its free end for the tension of the spring to act and hold the wetting-wheel in contact with the grinder wheel or stone, for the revolving of the grinder wheel or stone to rotate the wetting-wheel and apply the water or liquid to the acting or abrasive face of the grinder wheel or stone, substantially as described.

'JOHN J. REXROTH.

Witnesses:

OSCAR W. BOND, F. E. W. REXROTH.

IOO 

